Create a new project and add the slideshows and ROM contents again. That will be the safest route to go.
Follow this workflow to help ensure the best quality final product:
Once you have the project as you want it save it as a disk image via the File ➙ Save as Disk Image menu option. This will separate the encoding process from the burn process.
To check the encoding mount the disk image and launch DVD Player and play it. If it plays OK with DVD Player the encoding was good.
Then burn to disk with Disk Utility or Toast at the slowest speed available (2x-4x) to assure the best burn quality. Always use top quality media: Verbatim, Maxell or Taiyo Yuden DVD-R are the most recommended in these forums.
Klaus - I think you missed the point, I can easily create slideshows, the problem is getting rid of them. I have deleted the slideshow, but the ROM contents remained, and cannot be deleted as iDVD thinks it is associated with a slideshow.
Old Toad - Thanks, I'll use the tip about saving as a disk image, if I bother with iDVD. It looks like I'll have to start again, which is really annoying to lose the work I've done so far and have to repeat it all. I might have a look and see what other DVD programs people recommend, as the first try with iDVD has been very disappointing.
OK, a picture should help, see below. The project has not been burned, I am working in iDVD, no discs were harmed in the making of this problem.
Picture below shows my project map and the DVD-ROM conents window (Advanced>Edit DVD-ROM Comntents... ) . Note the lack of slideshows, yet there are 4 folders of slideshow images, greyed out so they cannot be altered by the user.
As I said above, I wish to remove the images that were associated with a slideshow from the DVD-ROM area of the project. All instructions I can find on how to do this state I have to either delete or edit the slideshow, which I cannot do as it does not exist.
I'll probably just start again, and next time I need to do a DVD I'll see what else is out there. I seem to be spending more time trying to solve a software problem than I do making the disc.
Great, now when I open iDVD it comes up with the project I had a problem with, but if I try to close that window, or start a new project iDVD crashes and quits. I can work on the project which I no longer want (because of the files I can't delete) no problems, I can edit and save, but I can't open any other projects, or start new ones.
Time to look out my original install disc and try re-installing it I think.
Doesn't look like having this finished and burnt (20 copies) by Saturday morning is going to happen...
OK, I seem to have sorted it.
I deleted the project file, and re-installed iDVD, and it now appears to be working, at least I can start the program and start a new project. I won't bother with slide shows, I'll make them as movies in Adobe Premiere elements, and just manually add the files to go into the DVD-ROM area.